mirror of
https://github.com/Atmosphere-NX/Atmosphere
synced 2024-12-23 21:01:13 +00:00
136 lines
No EOL
3.3 KiB
C
136 lines
No EOL
3.3 KiB
C
/*
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* Copyright (c) 2018-2019 Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "fs_utils.h"
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#include "mc.h"
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#include "lib/fatfs/ff.h"
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#include "lib/log.h"
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FATFS sd_fs;
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static bool g_sd_mounted = false;
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static bool g_sd_initialized = false;
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static bool g_ahb_redirect_enabled = false;
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bool mount_sd(void)
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{
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/* Already mounted. */
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if (g_sd_mounted)
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return true;
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/* Enable AHB redirection if necessary. */
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if (!g_ahb_redirect_enabled) {
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mc_enable_ahb_redirect();
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g_ahb_redirect_enabled = true;
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}
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if (!g_sd_initialized) {
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/* Initialize SD. */
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if (sdmmc_device_sd_init(&g_sd_device, &g_sd_sdmmc, SDMMC_BUS_WIDTH_4BIT, SDMMC_SPEED_SDR104))
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{
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g_sd_initialized = true;
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/* Mount SD. */
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if (f_mount(&sd_fs, "", 1) == FR_OK) {
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print(SCREEN_LOG_LEVEL_INFO, "Mounted SD card!\n");
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g_sd_mounted = true;
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}
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}
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else
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fatal_error("Failed to initialize the SD card!.\n");
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}
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return g_sd_mounted;
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}
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void unmount_sd(void)
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{
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if (g_sd_mounted)
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{
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f_mount(NULL, "", 1);
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sdmmc_device_finish(&g_sd_device);
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g_sd_mounted = false;
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}
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/* Disable AHB redirection if necessary. */
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if (g_ahb_redirect_enabled) {
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mc_disable_ahb_redirect();
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g_ahb_redirect_enabled = false;
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}
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}
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uint32_t get_file_size(const char *filename)
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{
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/* SD card hasn't been mounted yet. */
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if (!g_sd_mounted)
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return 0;
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/* Open the file for reading. */
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FIL f;
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if (f_open(&f, filename, FA_READ) != FR_OK)
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return 0;
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/* Get the file size. */
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uint32_t file_size = f_size(&f);
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/* Close the file. */
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f_close(&f);
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return file_size;
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}
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int read_from_file(void *dst, uint32_t dst_size, const char *filename)
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{
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/* SD card hasn't been mounted yet. */
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if (!g_sd_mounted)
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return 0;
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/* Open the file for reading. */
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FIL f;
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if (f_open(&f, filename, FA_READ) != FR_OK)
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return 0;
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/* Sync. */
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f_sync(&f);
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/* Read from file. */
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UINT br = 0;
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int res = f_read(&f, dst, dst_size, &br);
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f_close(&f);
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return (res == FR_OK) ? (int)br : 0;
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}
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int write_to_file(void *src, uint32_t src_size, const char *filename)
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{
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/* SD card hasn't been mounted yet. */
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if (!g_sd_mounted)
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return 0;
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/* Open the file for writing. */
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FIL f;
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if (f_open(&f, filename, FA_CREATE_ALWAYS | FA_WRITE) != FR_OK)
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return 0;
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/* Sync. */
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f_sync(&f);
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/* Write to file. */
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UINT bw = 0;
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int res = f_write(&f, src, src_size, &bw);
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f_close(&f);
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return (res == FR_OK) ? (int)bw : 0;
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} |